I understand that in RichFaces 3.3.1 rich:page can use e.g. the theme "simple" by adding the attribute theme=simple. This configuration refers to the file "simple.theme.properties" which references org/richfaces/renderkit/html/css/simple.xcss.

So far so good. Can anybody give me a hint how to modify simple.xcss so that I get the blueSky L&F? Any hint is highly appreciated!